Crop Protection Network

Fungicide ROI calculators for corn, soybean white mold, and alfalfa. Newly redone at cropprotectionnetwork.org/roi-calculators. @Ag_PMT @badgercropdoc @datascience_uw @MartinChilvers1 @DTelenko @BisonBeanDoc @hoperbecton @baldpathologist @travisfaske @alabamaED @alisonrISU @tjcksn @ppp_trey #corn #soybeans #alfalfa #fungicide #grow26

Cool temperatures, approximately 60-74°F (16-23°C), and moisture events are key drivers of tar spot development. A single fungicide application at the tassel to milk (VT-R3) growth stage has generally provided the most consistent protection of the canopy from tar spot and the greatest potential for positive return on investment (ROI). Read more in the new Overview of Tar Spot at cropprotectionnetwork.org/publications/a…. From @DTelenko @MandyBish1 @BorisCamiletti @MartinChilvers1 @UNL_CropWatch @ILextension @alisonrISU @maddishires @badgercropdoc @AlbertTenuta @cropdoc08 @YuanZeng3 @baldpathologist @travisfaske @UMNExt @ppp_trey

“Chemical management strategies do not result in complete control of white mold and, therefore, should be considered only as one component of an integrated management program. Reduction of white mold incidence achieved by fungicides in university field trials has ranged from zero to approximately 60%.” From the updated publication An Overview of White Mold at cropprotectionnetwork.org/publications/a… by @badgercropdoc @cropdisease @MartinChilvers1 @travisfaske @DylanMangel @dsmuelle @ISU_IPM @BisonBeanDoc @cropdoc08 +more @AlbertTenuta @baldpathologist @MandyBish1 @MahDuffeck @maddishires @DTelenko #soybean #USSoy

#Tarspot found in Southwest #Wisconsin, @wicorngrowers urged to keep scouting. Hear more about the @CropNetwork report in our interview with @UWMadisonExt @badgercropdoc @brownfield #agnews brownfieldagnews.com/news/tar-spot-…

Corn with crown rot often senesces early or dies prematurely. These "ghost plants" are frequently surrounded by healthy plants. Read more in Extension's doi.org/10.31274/cpn-2… From @alisonrISU @cropdoc08 @baldpathologist @MandyBish1 @MartinChilvers1 @MahDuffeck @travisfaske @UMNExt @dsmuelle @alabamaED @badgercropdoc @DTelenko @AlbertTenuta @YuanZeng3. #agx @NationalCorn

Japanese beetle in soybeans. @MUExtension @MizzouIPM

This is the most common disease I’m seeing again in 2026. I hope the rest of this season goes a lot differently than 2025 did! 🤞

Common rust on corn in Alabama. Not a significant problem. We still have not confirmed southern corn rust, though we have eye’s in the field. Common rust appears as powdery, elongated, brick-red to cinnamon-brown pustules that erupt on both sides of the leaves @CropNetwork

Sarah Ganske, K-State weed specialist, is on today's show of Agriculture Today to chat about what herbicide considerations growers need to take into account when they are getting ready to spray their corn, grain sorghum or cotton. agtodayksu.libsyn.com/2219-livestock…

Reniform nematode often causes yield loss in #soybean before visible symptoms appear. Identify reniform nematode pressure, learn how to soil test and shape an effective active management strategy with our Nematode Management Guides: bit.ly/44pP7OH @UnitedSoy

How are 2026 #corn yield forecasts developed? Learn how a multi-university team combines weather, soils & #crop modeling to track yield potential across the #CornBelt throughout the growing season: buff.ly/Cl6Zosm #NebExt #NebraskaAg #AgTwitter #CropProduction #Farming

We have a lot of incredible scouts catching rust development VERY early but so far all verifications appear to be common rust. Under a microscope, it is easier to see the maturing spores turning the brick red color. Keep scouting! #ISUCrops

A few dry days over the Fourth of July weekend allowed us to finish post-emerge soybean herbicide applications. With spraying wrapped up, we turned our attention to crop scouting in corn and soybeans. We're beginning to see corn aphids and some disease pressure, including common rust, gray leaf spot (GLS), and northern corn leaf blight (NCLB). Continued scouting will be critical over the next few weeks as we evaluate potential fungicide and insecticide needs. Weekend rainfall ranged from 0.5–3.5 inches across the region, with northern areas receiving the highest totals. This week, we'll continue scouting fields and addressing any soybean weed escapes. Wheat harvest is nearly complete, and cooler temperatures should provide favorable conditions for baling. You can find Brandon Hall's crop report here: bit.ly/4vn4PVY

🌱Hear @BisonBeanDoc explain the role canopy closure plays in white mold development.

First southern rust of the year in Hinds County, MS. Thankfully, the vast majority of the corn in MS is beyond a stage where southern rust could impact yield @MSUExtService @MSUextPlantLab @MississippiCorn

This week's K-State Agronomy eUpdate is here! Topics include: Herbicide applications in hot weather, Western bean cutworm scouting, #cotton pests (fleahoppers, lygus bugs & cotton jassid), Upcoming meetings & workshops, and more.🔗agronomy.k-state.edu/eupdates/2026/… #ksag #agronomy #cropproduction

Convintro™ Herbicide (diflufenican, Group 12) has received U.S. EPA approval. Here’s what it brings to the table for US corn and soybean growers ⬇️

What role does canopy closure play in white mold development? Learn more about white mold in #soybeans ndsu.edu/agriculture/ex…

Good decisions start with good information. Ontario CropIPM is a go-to resource for identifying crop pests, diseases and weeds, with scouting tools to help Ontario grain farmers make informed management decisions. Explore it here: buff.ly/SQIeSbx

Goss's wilt lesions are long, gray-green to black, water-soaked, and have wavy edges. Streaks resembling freckles in lesions are a distinctive symptom. Fungicides are not effective against this disease. Resistant hybrids are available. Crop rotation and tillage reduce bacterial survival. Ask local Extension for more info. @alisonrISU @rodrigobonofre @OnofreLab @maddishires @BorisCamiletti @badgercropdoc @DTelenko @ppp_trey @MandyBish1 @YuanZeng3 @NationalCorn @NeCGA @NDCornGrowers @sdcorn @iowa_corn @mncorn #corn #grow26